package com.itheima.reggie.config;

import com.itheima.reggie.common.JacksonObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

@Slf4j
@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport {
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        //因为没有把静态资源放在static下所以要映射
        log.info("静态资源映射！");
        registry.addResourceHandler("/backend/**")
              .addResourceLocations("classpath:/backend/");
        registry.addResourceHandler("/front/**")
                .addResourceLocations("classpath:/front/");
    }

    //扩展MVC的消息转换器
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        log.info("扩展消息转换器...");
        MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();
        //设置对象转换器，底层用jackson将JAVA对象转换为json
        mappingJackson2HttpMessageConverter.setObjectMapper(new JacksonObjectMapper());
        //将上面的消息转换器对象追加到MVC框架的转换器中
        converters.add(0,mappingJackson2HttpMessageConverter);
    }
}
